Battery Saver Signal Circuit

BATTERY SAVER SIGNAL CIRCUIT

Description

BCM cuts the interior room lamp power supply depending on the vehicle condition. Total illumination control unit cuts the hospitality lighting power supply according to interior room lamp power supply (battery saver signal). This function prevents the battery from over-discharging if the driver neglects turning OFF any lamps.


Diagnosis Procedure


1. CHECK BATTERY SAVER SIGNAL INPUT

CONSULT ACTIVE TEST
1.Turn ignition switch ON.
2.Select "BATTERY SAVER" of BCM (BATTERY SAVER) active test item.
3.While operating the test item, check voltage between total illumination control unit harness connector and ground.





Is the measurement value normal?
YES- GO TO 2.
NO- Check the interior room lamp power supply circuit. Interior Room Lamp Power Supply Circuit.

2. CHECK BATTERY SAVER SIGNAL BY CONSULT

CONSULT DATA MONITOR
1.Turn ignition switch ON.
2.Select "BAT SAVER SIGNAL" of TOTAL ILLUM C/U data monitor item.
3.Check the monitor status.





4.Turn ignition switch OFF.
5.Disconnect the BCM (M119) connector.
6.Turn ignition switch ON.
7.Check the monitor status.





Is the item status normal?
YES- Battery saver signal circuit is normal.
NO- Replace the total illumination control unit.